Slur cam deflecting device for cotton knitting machines



Dec. 30, 1952 A. DYJAK 2,623,370

SLURCAM DEFLECTING DEVICE F'OR COTTON KNITTING MACHINES Filed May 4, 1948 2 SHEETS-SHEET l INVENTOR ATTORNEY5 A. DYJAK Dec. 30, 1952 SLURCAM DEELECTING DEVICE FOR COTTON KNITTING MACHINES Filed May 4, 1948 2 SHEETS-SHEET 2 ATTORNEYS Patented Dec. 30, 1952 UNITED STATES PATENT OFFICE SEUR' CAM DEFLECTING DEvIoEFoR oo'rL TON KNITTING MACHINES Adolf' Dyjak,l.Zlin, Czechoslovakia, assignor to Bata,-.n'arodni podnik, Zlin, Czechoslovakia` Applicationmaya, 194s, serial No. 25h65 In Caechslovakia May' i5, 1947 (Cl. (S6- 110) 11` claims. l#

Thel presentinvention relates'lto cotton knittingv machines and more? particularly toy ai device provided on a cotton knitting t machine for'- 'de'-V flectir'xgftheA slurcarnsA` in a direction atright angles' tor-the path`ofthe'-sinkin`g movement of the said slurcams along' their stationary guide bar.

In some modern cottoni knitting'4 machinesit is the practice when knitting a narrowed vpart of-a fabric as is the case; for instance',vwhen knitting the instep` of a-fstocking, to shorten the path of the sl'urcans.` the decrease in length ofthe slurcam` path beingmutilised to permita lower speed of the sinking: movement of the slurcams' so as to increase the' reliability and the cleanness of plating inthe' knitted fabric. The reduction in length of the slurcamfp'ath may be provided for 'in anur'nber of Ways, but in any case it is alwaysfnecessary for the slurcams to-travel to a1 certain distancer beyond the anticipated knitting Width` of the sinker's.- As a consequence it isneces'sa'ry' to provide-for delection ofl the slurcani out of reach off the jacks of those sinkers which should remain idle, aswotherwisesnch' sinkers' would interfere with the operation of the sink'er box during the actuation-of thesinkers and with the operation of the wide and narrow loop' transfer combsduring.` their common' advance along vthe needle row:

Severalwmetnods. are known (e1 'gs German" PatentNo'. 5935777)` pern'iitti-ng toldefl'ect the s'lu'rc'ams"` out of rreact-1f. of` the jacks otv those sinkersv which` should not be' inl' operation at the cciinp'letionf of. the shortened slurcani Among' the known.' methods a single'` patlil. one'Y is` char'a'cterized` by" an arrangement on ai stationary'. guide" bar. A InA` this arrangement th''fsl-uroams are" mounted-nthe slu'rcan. house aidir'tin at rig'litarigles to the direction of movement of the slurcarifi` housingl along the stationary guide bar.`r the slurcams being pulled by; sbr-ing tension out of reach` of the sinker jacks. Theloc'king' of the slurcarns in a posi'- tionfoi"controlling the jacks during the'tirne of` nseful operation 4ofthe-'1slurcarnsisA provided for' by v'a`,f`1novalole memberworkingragainst spring` pressure; Therdisadvantage of the arrange;- ment justdescribedconsists in this that before each-sinking Ymoveifnent of the slurcams is" terminated, presuming that the slurcarns are to be removed from thefpa'th of the jacks of the idle sinkers; it'- -is always necessarvto impart again an impulse tothe movable member so that thelatter mayV unlock the slulcarns and allow' the springs to deflect the slurcams outof reach way that it is no longer necessary to shiftI allv the slurca'rn deecti'ngA members at the end of each sinking movement of the slu'rcamsf.`

The essential feature" ofthe present invention consists in the arrangement, at the points of reversal of the slurcamf movement,l of ref` tractable deecting cams; which in the working4v position of thesame'cause' the' slurcamsto be deflected out of reach of the jacks associated with the sinkers. The delecting earns are" adapted to be brought inthe path of movement of the slurtxarns by meanso'f a mechanism which gives to the sinker mechanism an impulse for changing-"the Speed ao. the length of the path of the slur-earns; period of knittinga narrow part of the knitted product the 'rtractable deflectingcar'ns ar'retained -in working` positic'nznin4 the path o'fnthe; slurcams and do not rqireany special driving devices. Thus,4 as `a whole, the control ofthe said cams consists in this that at the beginning of the knitting operation cna reduced width ofthe fabric, whenit isfdesired to reduceat the same time the length` of Vthe slurcarn; path and the speed of the slurcams; the deflecijfing cams are brought into the path of the sl-urcaxn under the action of thesame elements which cause the slurcam path to beshorten'ed `and its speed to be` decreased. The delecting cams areretained in thisposition up to the momentwhen the control device of the slurcarns` will impart to the'latter again their normal length .and speed of travel, the deecting cams being retracted. from the path of the sluroams 'at thisexact Preferably the"deecting cams arel mounted in the guide bar of the slurcains which' moment.

during their operation on the sinkersare still held in their normal position by means of. a

safety detent.

Further advantages and features.: of the 'presi ent invention will appear from the 'following Therefore; during the entire description when read in conjunction with the accompanying drawings, in which:

Fig. l shows the control mechanism of the deiiecting cams,

Fig. 2 is a plan view showing one of the deflecting cams in position in the slurcam path; and

Fig. 3 is a sectional side View corresponding to Fig. l.

Referring more particularly to Figs. 2 and 3, the slurcams I are mounted slidably in the slurcam housings 2 which are guided on a stationary bar 3. A spring 4 bearing with its one end against a rib 5 provided on the box 2, and with its other end against the body of the slurcam I, urges said slurcam I permanently in the direction marked in Fig. 2 by the arrow S1, i. e. to ward a position in which the slurcam I engages with the sinker jacks (not shown). On the lower part of the body of slurcam I is fastened a roller E which is guided in a groove l formed in the guide bar 3.

At the end positions of the shortened path of the slurcams I as provided for in the co-pending application of Jaroslav Vaclavik, Ser. No. 25,606, filed May 7, 1948, and now Patent No. 2,571,314, the groove l of the guide bar is provided with a slot 8 through which retractable deflecting cams 9 provided with inclined cam surfaces project, as may be seen in Figs. l and 2. At the places of operation of the deflecting cams 9 the groove l is provided with a corresponding recess II. The deilecting cams S are moved through the slot 8 up and down in such a way that they are brought into the path of the roller S slurcam I in the groove 1, or are retracted into the said slot 8. Each deflecting cam 9 is provided With a stud I2 (Figs. 1 and 3) which is guided vertically in a bracket I3 fastened to the underside f the guide bar 3. The stud I2 may be shifted by a forked lever I4 which is fastened adjustably on a shaft I extending underneath the guide bar 3 and serving to drive all the deecting cams 9 of the whole Inau chine at the same time. The cam 9 is locked in its upper and lower positions by means of spring urged balls I6, as shown in Fig. l, engaging into cavities I'i provided in the stud I2. The shaft I5 is controlled from projections I8 provided on the slide of the Coulier mechanism of the typeshown in the co-pending application Ser. No. 25,606, the necessary impulse being given by a control shaft 22 which is rotated, for instance, by a pattern drum, not shown, which controls also the Coulier mechanism determining the length of the slurcam path. The shaft drives by means of a lever 2i, a link 22 and a lever 23 a shaft 24 which is mounted in bearing 25 arranged in the frame of the machine and carries on its one end a fork 2t engaging between two rings 21 provided on a shaft 23. The rings 2l are keyed on the shaft 26 and are controlled by the fork 26 in such a way as to impart axial motion to the shaft 25, while permitting at the same time turning movement of the said shaft 28. The shaft 28 carries at its one end a lever 2S which through the intermediary of a link 32 and a lever 3| is adapted to rotate the shaft I5, while the opposite end of the shaft 2S carries two cam sectors 32 and 33 keyed on the shaft side by side. By-axial movement of the shaft 28 either cam sector may be brought in the path of the projection i8 on the slide i9. The cam sectors 32 and 33 are locked in` position by means of spring pressed pins 34 and 35 which are mounted F on the sli) in housings 3E on the frame of the machine and engage in notches 37 and 38 of the sectors 32 and 33.

During the time when the slurcams control the sinker jacks, the body of each slurcam I may be locked in working position in the slurcam housing 2 by means of a detent 39 shown in Fig 3 and engaging in a recess d provided in the slurcam body. The detent 39 is rotatable about a pin 4I in the slurcam housing 2 and has an arm 42 co-operating with a stud 43 slidable in the slurcam housing. The detent 33 is forced into the recess 46 by means of a spring 44. During the movement of the slurcam housing 2 the detent 39 is retracted from the recess 40' by contact of the stud 43 with the inclined face of a small arm 46 shown in Fig. 2 and mounted rotatably about a pin 41 in a recess i8 ci the bar 3. The spring 43 urges the arm 46 per manently toward the recess 48 out of the way of the stud 43, as shown in dotted lines in Fig. 2. The arm is brought into the path of stud t3 concurrently with the advancing movement of the deiiecting cam S from the slot 'I into the path of the roller 6 on the body of the slurcam l, this being eifected by means of a cam finger 50 arranged directly on the deecting cam 9.

The apparatus so far described operates as follows:

When a knitted fabric of normal width is being produced the bodies of the slurcams I occupy their normal projected position in which the slur-cams act on the jacks, not shown, of the sinkers. Thus the slurcam bodies are in the position shown in Figs. 2 and 3 relatively to the slurcam housing 2. In this position each slurcam body is locked -by the detent 39 engaging in the recess 40 of theslurcam body and subjected to the action of the spring 44. Each delecting cam Si is in its llower position together with the finger 53 (Fig. 8), so that the slurcam housing 2 when moving sideways along the bar 3 travels beyond the slot 3 to its one end position without the roller 6 being inuenced by the cam 3, or the stud 43 by the ringer 5S. Also the mechanism controlling the deecting cams 9 is in its starting position shown in Fig. l, in which the pin 35 engages in the notch 38 of the cam sector 33 which is in position over the projection I8 of the slide I9.

When a narrowed part of the fabric is to be knitted and accordingly the slurcams will be caused to travel along a shortened path at a reduced speed through the intermediary of the Coulier mechanism, not shown, and of a worm driveY as shown in co-pending application Ser. No. 25,606, Vaclavik, the commanding shaft will be rotated under the action of the change-over device in the direction of the arrow S2 shown in Fig. l, the link 22 will be moved up causing the shaft 24 to turn in the direction of the arrow Ss.

Vand the shaft 24 by means of the fork 26 will lcause the shaft 28 to be shifted in the direction of the arrow S4 to a position in which the cam sector 33 is disengaged from the pin 35 and the cam sector 32 is located over the projection I8 on the slide IS. As a consequence, at the next vstroke of the slide I3 to the right, the projection L8 will abut against the cam sector 32 vandwill cause the same to rotate in the direction of the `'arrow S5 to a position in which the pin 313 will engage into the notch 37. Concurrently with the rotation of the sector 32, the shaft 28 is rotated in the same sense together with the lever 29 which through the intermediary of the link 36 and lever 3| will cause the shaft I5 to rotate in the direcaeaaaro.

52 tionfof the `arrownl-S resulting in arrupwardrmovea. ment' of. the ideiiectingl cam. `9, so.;that'the Y'latter enters into the groove 'I 'of the guideyban, being locked in this position by the ball i6 engaging'inthelower cavityI'I of thestud I2;4 Concurrently with the upward movement ofthe decctingxcanr 9, the cam iinger 501is'also `moved upwardsand pushes the `arm 46-against they pressure (of the spring 49to theposition` shown in Fig.:2. At the next stroke of the'slurcam housings Zalongthe guide bar 3 to the left, first each studt43 will engage with the `inclined face 45 on thearin 46 and by the effect of this inclined face will `cause the detent 39 to turn about'thepin `4I against' the pressure of the spring 44 in such a way that the detent 39 will be disengaged from therecess 40 so that at the next moment, Whentheroller. B on the body of each slurcam I willengagewith` the cam face-I of the deilecting cam 9, the body, of each slurcam I will be pushed into the slurcatxrA housing 2 against the pressure of the` spring 4 in a direction opposite to the arrow Siwhereby each slurcam I is moved to the position shown in dotted lines in Fig. 2 outu of reach of thejacks which are associated with the'sinkers.; Atthe back Astroke of each slurcam housing 2 to the right, each slurcam I will occupy, during the travel of the roller 6 along the straight groove 1, again its original `outward position to which it will be locked bythe detent 39 at :the `'moment when, due to the movement of,` thehousing `2 Ito:

the right, the stud 43Will comeoutof contact with the arm 45. Towards the end of the travel of each slurcam housing 2` to its right hand extreme position in the shortenedfpath, each slurcam I will abutV through fthe-stud, and roller 6 against a similarly arranged arm 46 of a de,- flecting cam 9, so that the rslurcam willbe une locked` again. in the 4slurcami housing 2 vand will be moved 'out of reach'of the 'jacks associated with the sinkers.

Thus the slurcams I are automaticallydelected out of reach of the sinker jacks in the above described way at the end points of the slurcam movement during the whole period of knitting a narrowed part of the product without requiring any separate drive.

As soon as the machine should restart knitting over the entire normal width of the knitted fabric, when the slurcams will have to perform their maximum movement and it will be no longer necessary to deiiect them out of reach of the sinker jacks, the control shaft 20, which in a manner known per se is adapted to extend the path of the slurcams and to increase the speed of the-latter through the intermediary ofthe Coulier mechanism, will be rotated in a direction opposite to that marked by the arrowSi in Fig. 1, so that the link 22 will be pulled downward. This movement of the link 22 causes the shaft `28 to be moved axially in a direction opposite to that of the arrow S4 in Fig. 1, so that the cam sector 32 is -disengaged from the pin 34 and the cam sector 33 is brought into the path of the projection I8 provided on the slide I 9. Thus during the movement of the slide I9 to the left, the projection I8 will abut against the sector 33 causing the shaft 28 to be turned clockwise, so that the link 30 will bemoved upward, the shaft l will be turned clockwise and the levers I4 will retract all deflecting cams 9 downwards whereby the whole mechanism will be brought back to the position shown in Fig. 1. By retracting the cams 9 downwards, the pressure of the cam finger 50 on the arm -46 will be relieved and the-1atter` will. be.E forced; by :the :fspring $149` into.-` the. recess; 48 `providedinl .the bar'3.: Thenreaclt slurcam .travels 'along its complete l working'patlt .in z its outward' or: projected .position shown. in'

Fig.` 3 in which the slurcam is lool-ted.`

What'I claim is:

1.; In a: flat.. cottonlmitting` machine,` a9 guide..

bar,` a slurcam housing reciprocableon said guide bar, a retractable slur camt member Jcarried'fby said slurcam hou'snig, a pair of spaced deecting;

j. `cam members disposed in apertures in` said guide zbar; a reciprocating member constituting apart' of the Couiier mechanism of the machine, and` means actuated by said recprocatingfmember @of the Coulier mechanism for advancing said de-i fleeting cams into the path of said slur cam mem# ber lfor retracting'the same at the ends'of the path of reciprocal movement thereof.

2; In a fiat cotton knitting machine including a Coulier mechanism, a guide bar, arecipri'icating slur cam housing on said'guide bar, a'slr cam member carried by the slur cam housing; i jacks actuated by the slur cam member and nar 'rowing means for driving said slur cam housing n .at reduced speed and through a shortened pathg of' movement when Vknitting a narrowed portion of fabric, the improved construction which comprises-means for mounting Asaid slur cam for-re-f traction from a projected position towhichiit engages and actuates thejacks to a retracted positionin which it clears the jacks, spacedd'- fleeting cams mounted in apertures insaid` guide barat the ends of the shortened path of moves ment of the `slur cam housing and means'ach .tuated by a` part ofl the Coulier mechanism for .advancingsaid deflecting'cams into the path ofE Vfmovement of the slur cam member to shiftV the tion in each direction.

same to lretracted position at the: end of its mo@ 3. In a iiat cotton knitting machineincluding' a Coulier mechanism, a guidebar, a reciprocating slur-cam housing on said guide bar," aslur cam member carried by the slur cam housing, jacks `actuated by the slur cam member and narrowing means for driving said slur cam housing at reduced speed and through a shortened path of movement when knitting a narrowed portion of fabric, the improved construction which comprises means for mounting said slur cam for re vtraction from a projected position in which it -engages and actuates the jacks to a retracted position in which it clears the jacks, spaced deflecting cams mounted in apertures in said guide bar at the ends of the shortened path of move- `ment of the slur cam housing, and means for maintaining the deflecting cams in the advanced 1 :position during the knitting of the narrowed part of the fabric.

ing, spaced deflecting cams disposed in apertures in the guide bar at the ends of the shortened path of motion of the slur cam housing. and

shifting means for projecting said deflecting cams vertically into the path of the slur cam and for retaining the same in the projected position during the knitting of a narrowed part of the fabric.

5. In a fiat cotton knitting machine. :including a Coulier mechanism, a guide bar, a reciprocating slur cam housing on the guide bar and narrowing means for driving said slur cam housing at ren duced speed and through a shortened path for knitting a narrowed portion of fabric, the iniproved construction which comprises a retractable slur cam mounted on the slur cam housing, spaced deecting cams disposed in apertures in the guide har at the ends of the shortened path of motion of the slur cam housing, and shifting means actuated by a moving part oi the Coulier mechanism for projecting said deflecting cams vertically into the path of the slur cam concurrently with the actuation of the narrowing means to shorten the reciprocal path of the slur cam housing whereby to retract the slur cam from 1 engagement with the sinker jacks at each end of the reciprocal path thereof during the knitting of a narrowed part of the fabric.

6. A knitting machine according-to claim 5,

in which the shifting means for projecting the deecting cams into the path. of the slur cam includes a pair of cam sectors andthe moving part of the Coulier mechanism is provided with a projection which engages said cam sectors to ctuate the shifting means. y 7. A knitting machine according' to claim 5 in which the shifting means for projecting the deector cams into the path of the slur cam includes a transmission shaftand link and lever connections between the transmission shaft and the defiecting cams, cam sectors on said transmission shaft and a projection on the moving part of the Coulier mechanism for engaging one of said cam sectors to actuate the transmission shaft.

8. In a knitting machine according to claim 7, a control shaft for the sinker mechanism, con nections between said control shaft and said transmission shaft for shifting one-of the cam sectors into the path of the projection on the moving part of the Coulier mechanism upon rotation of the control shaft.

V- 9. A knitting machine according to claim 8 in which the cam sectors are spaced on said transmission shaft and the connection between said control shaft and said transmission shaft shifts the latter axially upon rotation of the control shaft.

10. In a cotton knitting machine including a guide bar and a reciprocating slur cam housing on the guide bar, a retractable slur cam mounted in said slur` cam housing shiftable from a projected jack engaging position to a retracted jack disengaging position, a spring for biasing said slur cam to a projected position, a pair of retractable defiecting cams disposed one at each end of the path of motion of the slur cam housing, means for shifting said defiecting cams into the path of said slur cam for retracting the same at the ends of its reciprocal path and means for iocking the slur cam against retraction during its passage 4between said deflecting cams.

11. A cotton knitting machine according to claim 10 in which the locking means comprises a detent carried by the slur cam housing and a detent releasing member is provided adjacent each of the deflecting cams for releasing the detent prior to engagement of the slur cam by the deflecting cams when the latter are shifted into the path or" the slur cam.

ADoLF DYJAK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date $42,052 Kettleband May 26, 1936 FOREIGN PATENTS Number Country Date 549,079 France Feb, l, 1923 554,075 Great Britain' June 18, 1943 628,151 Germany Mar. 28, 1936 703,635 Germany Mar. 13, 1941 

